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// download_thread.cc
//
// Copyright (C) 2005, 2008 Daniel Burrows
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of
// the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; see the file COPYING. If not, write to
// the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
#include "download_thread.h"
#include <generic/apt/download_manager.h>
#include <generic/apt/download_signal_log.h>
#include <cwidget/toplevel.h>
#include <sigc++/bind.h>
#include <sigc++/slot.h>
#include <sigc++/functors/mem_fun.h>
namespace cw = cwidget;
template<typename RVal>
void background_execute(sigc::slot0<RVal> slot,
cw::threads::box<RVal> *return_box)
{
return_box->put(slot());
}
template<>
void background_execute<void>(sigc::slot0<void> slot,
cw::threads::box<void> *return_box)
{
slot();
return_box->put();
}
// Note: all these do_foreground_execute() overloads are thread-safe
// only because C is download_signal_log and that's not a trackable
// object. Furthermore, they're safe only under the assumption that
// the signal log is not deleted
/** Run the given method call in the foreground and return its value. */
template<typename C, typename RVal>
static
RVal do_foreground_execute(C *inst,
RVal (C::* fun) (),
post_thunk_func post_thunk)
{
cw::threads::box<RVal> return_box;
sigc::slot0<void> background_execute_slot =
sigc::bind(sigc::ptr_fun(&background_execute<RVal>),
sigc::mem_fun(inst, fun),
&return_box);
post_thunk(make_safe_slot(background_execute_slot));
return return_box.take();
}
/** Run the given method call in the foreground and return its value. */
template<typename C, typename RVal, typename Arg0>
static
RVal do_foreground_execute(C *inst,
Arg0 arg0,
RVal (C::* fun) (Arg0),
post_thunk_func post_thunk)
{
cw::threads::box<RVal> return_box;
sigc::slot0<void> background_execute_slot =
sigc::bind(sigc::ptr_fun(&background_execute<RVal>),
sigc::bind(sigc::mem_fun(inst, fun), arg0),
&return_box);
post_thunk(make_safe_slot(background_execute_slot));
return return_box.take();
}
/** Run the given method call in the foreground and return its value. */
template<typename C, typename RVal, typename Arg0, typename Arg1>
static
RVal do_foreground_execute(C *inst,
Arg0 arg0,
Arg1 arg1,
RVal (C::* fun) (Arg0, Arg1),
post_thunk_func post_thunk)
{
cw::threads::box<RVal> return_box;
sigc::slot0<void> background_execute_slot =
sigc::bind(sigc::ptr_fun(&background_execute<RVal>),
sigc::bind(sigc::mem_fun(inst, fun), arg0, arg1),
&return_box);
post_thunk(make_safe_slot(background_execute_slot));
return return_box.take();
}
/** Run the given function call in the foreground and return its value. */
template<typename C, typename RVal, typename Arg0, typename Arg1, typename Arg2>
static
RVal do_foreground_execute(C *inst,
Arg0 arg0,
Arg1 arg1,
Arg2 arg2,
RVal (C::* fun) (Arg0, Arg1, Arg2),
post_thunk_func post_thunk)
{
cw::threads::box<RVal> return_box;
sigc::slot0<void> background_execute_slot =
sigc::bind(sigc::ptr_fun(&background_execute<RVal>),
sigc::bind(sigc::mem_fun(inst, fun), arg0, arg1, arg2),
&return_box);
post_thunk(make_safe_slot(background_execute_slot));
return return_box.take();
}
void background_status::Fetched(unsigned long Size,
unsigned long ResumePoint)
{
do_foreground_execute(real_status, Size, ResumePoint,
&download_signal_log::Fetched,
post_thunk);
}
bool background_status::MediaChange(std::string Media, std::string Drive)
{
cw::threads::box<bool> return_box;
do_foreground_execute<download_signal_log,
void, const std::string &, const std::string &,
const sigc::slot1<void, bool> &> (real_status, Media, Drive,
sigc::mem_fun(return_box,
&cw::threads::box<bool>::put),
&download_signal_log::MediaChange,
post_thunk);
return return_box.take();
}
void background_status::IMSHit(pkgAcquire::ItemDesc &item)
{
do_foreground_execute<download_signal_log, void, pkgAcquire::ItemDesc &>(real_status, item, &download_signal_log::IMSHit, post_thunk);
}
void background_status::Fetch(pkgAcquire::ItemDesc &item)
{
do_foreground_execute<download_signal_log, void, pkgAcquire::ItemDesc &>(real_status, item, &download_signal_log::Fetch, post_thunk);
}
void background_status::Done(pkgAcquire::ItemDesc &item)
{
do_foreground_execute<download_signal_log, void, pkgAcquire::ItemDesc &>(real_status, item, &download_signal_log::Done, post_thunk);
}
void background_status::Fail(pkgAcquire::ItemDesc &item)
{
do_foreground_execute<download_signal_log, void, pkgAcquire::ItemDesc &>(real_status, item, &download_signal_log::Fail, post_thunk);
}
bool background_status::Pulse(pkgAcquire *Owner)
{
cw::threads::box<bool> return_box;
do_foreground_execute<download_signal_log, void,
pkgAcquire *,
const sigc::slot1<void, bool> &>(real_status, Owner,
sigc::mem_fun(&return_box,
&cw::threads::box<bool>::put),
&download_signal_log::Pulse,
post_thunk);
return return_box.take();
}
void background_status::Start()
{
do_foreground_execute(real_status, &download_signal_log::Start, post_thunk);
}
void background_status::Stop()
{
cw::threads::box<void> return_box;
do_foreground_execute<download_signal_log,
void,
const sigc::slot0<void> &>(real_status,
sigc::mem_fun(&return_box,
&cw::threads::box<void>::put),
&download_signal_log::Stop,
post_thunk);
return_box.take();
}
namespace
{
void do_download_complete(download_thread *t,
pkgAcquire::RunResult res,
safe_slot2<void, download_thread *, pkgAcquire::RunResult> continuation)
{
t->join();
continuation.get_slot()(t, res);
}
}
void download_thread::operator()()
{
pkgAcquire::RunResult res = m->do_download();
sigc::slot0<void> download_complete_slot =
sigc::bind(sigc::ptr_fun(&do_download_complete),
this, res,
continuation);
post_thunk(make_safe_slot(download_complete_slot));
}
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